Which direction should the waterpump gear be pressed on/off the shaft?

Does the gear come off towrd the front of the shaft leaving the bearings on the rear, or do the bearings have to be pressed off first and then the retainer plate and then press off the gear to that direction?

 

The front cover is removed, then the shaft and bearings are pressed thru the center of the impeller out the back of the water pump housing. If you are converting it to an electric, I used two freeze plugs to seal the shaft hole in the housing to be on the safe side. Most kits only have one plug.

WD

http://www.cardomain.com/ride/2189634

 

No, I have the assembly out, I need to replace the gear, not remove the assembly altogether.
http://hometown.aol.com/onebadwskier...gear-shaft.jpg

 

A new one comes complete with flange. There should be no disassembly required.

 

He's swapping the gear for the LT4 ED gear, which doesn't come with anything but the gear

Like I said in another post, I didn't bother doing that, and was ok for over 20k miles on the stock WP gear and LT4 ED set.

 

Sorry, I can't read people's minds.

 

So do the bearings have to come off first and then the gear or can the gear be pressed off the other direction?

Surely someone has installed the ED LT4 gear, mines making a grinding/rubbing noise and the cam gear has some pecular marks on it so I'm replacing it with the ED one since its apart.

 

I'm doing the same thing soon, if my ED timing set ever gets here... I plan to support the gear in my press with the bearing end up, and press the shaft out through the bearing, plate, and gear all at once. Will use a deepwell socket to press with, since the rod on my press is too big. I'll measure the original gear's position on the shaft first, and make a piece of pipe the correct length to hold the new gear up while the shaft is pressed in it (As read somewhere here recently, via a link to the corvette forum). Then put the plate on, and finally press the bearing on.

I don't want to press it apart the other direction, because I would have to press the seal surface through the gear, and that would probably wind up scratching it. I haven't measured the seal-end diameter, but am not sure it would even fit through the gear.

Of course we will both be better off if somebody who has actually done this can verify!! But I've thought it through at least. FWIW.

Are you replacing the bearing? Seems like a good idea, but I haven't found the p/n. Sounds like most folks don't bother.

 

GM appearently does not sell just the bearing, but I found a post that said NAPA # P6201-2RSJ was the jewel.
I was at the local dealer parts counter today and they ordered me the entire assembly (gear, shaft, retainer, and bearing) which is part# 12551727 and they matched gmpartsdirect price for $62.
There was another assembly also listed for '95, part#10219554 which was $51 and the picture with it showed to be the 6 hole wp gear (the stocker)..so we ordered the other more expensive one hoping it already has the ED LT4 gear on it..if it does not, the dealer said they have a press and could try and swap the gears for me as I have the ED wp gear in hand.

FYI, I just got my "How to Rebuild LT1/LT4 Engines" book today, and on the section about the wp gears, it shows them installing the "assembly" and its the ED 3 hole wp gear with the beveled teeth and it notes that its not a servicable item so they must have purchased it that way.

 

Great, thanks for the NAPA bearing #! I got the 10219554 pump shaft, wish I had known about the 12551727. I should use the dealer more. Good info.

BTW sweet garage and parties!! You need more T/A's (not Ts & As, you seem to have plenty of those around).

 

The gear has to come out towards the back of the WP drive shaft. I did it just like JP95ZM6 described it. The only difference being that I used a small piece of solid rod to press instead of a deep well socket. I remember it was a tight interference fit. Iwould not try to accomplish it without a hydraulic press.

RG

 

lol i hear ya.. there's just been a whole bunch of issue threads lately that I've been following and this one happens to be one of 'em

 

Javier, you are probably right that the wp gear does not matter now that I think I see where the noise is coming from (retainer bolt barely making contact with the sprocket) as I see in some rebuilding manuals it shows the installation of the wp gear and it appears to the the 3 hole gear like is with the ED LT4 set but they have a stock cam gear, but since I have it all apart, I'm going to put the ED gear in it just for peace of mind I guess and a new bearing/shaft assembly. But there were some weird teeth marks on the ED cam gear and its supposed to be harder than the stock wp gear and it showed no wear and it has 90k miles on it.

 

YES!! FYI, the gear assembly came in today and the 12551727 gear assembly has the ED LT4 wp gear on it so I don't have to worry about pressing it on/off!

Oh yeah, thx, T/As and Ts and As are a great things